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Find the Correct OEM Flapper — Replace the Worn Toilet Flapper

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Fix a Toilet That Won't Flush: Troubleshooting Guide · Step 3 of 3

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To ensure a proper fit and fix the leak, locate the specific part number for the flapper. Look for it stamped on the inside back wall of the toilet tank. For this Gerber toilet, the part number is #99-827. Use this number to purchase the exact OEM replacement part online or at a plumbing supply store. Universal flappers may not work and could continue to leak, as the narrator explains they tried two different types without success.

Goal: Find the correct replacement flapper

  • You can search for the part number on online marketplaces like eBay.
  • The narrator tried two different universal flappers that failed to fix the leak, highlighting the importance of using the manufacturer-specified part.
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FAQs

How difficult is it to fix a toilet that won't flush, and how long does it usually take?

This is typically a beginner-level DIY repair, making it very accessible. Most issues, like adjusting the chain or water level, can be fixed in 10-20 minutes. Replacing a flapper might take slightly longer, around 30 minutes, especially for first-timers, but is still straightforward.

What essential tools do I need for this toilet repair, beyond the cutting pliers mentioned?

Besides the Angled Head Diagonal Cutting Pliers for chain adjustment or replacement, you'll primarily need a good pair of waterproof gloves for hygiene. A sponge or old towel can be useful for drying the tank if you replace the flapper, and a bucket might be handy to catch any remaining water.

Are there any important safety precautions I should take before starting this repair?

Always turn off the water supply valve behind the toilet before working inside the tank to prevent accidental overflows. Wear gloves to maintain hygiene, as toilet tanks can harbor bacteria. Avoid using harsh chemicals to clean inside the tank, as they can damage components.

I've adjusted the chain, and the water level is correct, but my toilet still flushes poorly or runs constantly. What else could be wrong?

If the chain and water level are correctly adjusted, the issue is likely with the flapper itself. Even if it doesn't look visibly damaged, an old, stiff, or ill-fitting flapper can cause leaks and poor flushing. Replace the flapper to ensure a tight seal and proper water release for optimal function.

Transcript
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because your flapper has dried out and it's bad. If you look on the inside of your toilet tank, right here you will have the part number. You can type it into eBay on eBay and it'll pop up and you'll get one of these. You see how clear this is? It's more supple, it's more pliable, it'll create a nice seal. So what

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